It's possible. I originally kept my 4 speed and stock mechanical linkage when I did my swap. I since changed to a 6 speed because I wanted overdrive and had to swap to a hydraulic clutch because it was the only way to use the transmission I wanted.
As a disclaimer, I would not guarantee by any means that what I had in my car for linkage was "stock". It fit is about all I can say. My car was so cobbled together when I got it that I have no idea what was really stock and what wasn't. I did have to shorter one of the legs of the Z bar to give more clearance to my headers, but it may not have been a stock A body piece to begin with.
